GS ISO Virtual Dynos

Hi Guys,

Just wanted to share some results of the G5 with ethanol. I have been running this for over 20,000 miles now. Just recently I stepped up to G5 ISO and I am loving it. The output numbers haven't changed with ISO, but the boost is always on target.

These are all G5 ISO. The Map 4 (same as map 0 bypass with CAN) was done a day ago at night hence the lower temperature. Everything scale 1:1 so there is no DynoJet modifier - this is HP calculated off of F=MA. Did 3 runs of each and they were all within 5hp of each other. I threw away the ones with funky looking curves, these are the medians. This is Map 0, Map 1, and Map 5 - 17.5psi limit.

Mods:

JB5 ISO 11
Wagner FMIC
DCI

Running 50-50 E85/91 mix in all of these runs. Fully catted. The weight is lighter than what I weigh since I was at 1/4 tank and subtracted out the difference of weight of fuel spent.

The HP on Map 5 is consistent with pre-ISO. Its essentially the same which makes sense considering there haven't been fueling/map tweaks.

Map 4 (Pass through):

Map 1:

Map 5 (not sure why my timing sucks, looks like it got lean, this is atypical. Normally I have perfect timing at 17.5 psi through out, as seen by AVG IGN = 0):

Terry has been of the utmost help and was not only responsive but was also willing to take my nagging into consideration and improve the product. It has taken a while to get here because this platform is extremely finicky, but thanks to his help I feel that my car is finally getting dialed in. The last thing I need to fix is this slight vibration/missing at full load high gears in the midrange. I believe I need to gap the plugs tighter... will keep you all posted. After that, larger turbos, Cobb, or DPs.

Mine have always whined a little bit - old ones just got replaced about 3k miles ago. New ones sound exactly the same. Just beat the hell out of the stockers and get them replaced for free under wastegate rattle warranty.

Mine have always whined a little bit - old ones just got replaced about 3k miles ago. New ones sound exactly the same. Just beat the hell out of the stockers and get them replaced for free under wastegate rattle warranty.

Ahhh, that doesn't sit right with me. Although neither did the water pump going out at 51k. Hahah.

Mine have always whined a little bit - old ones just got replaced about 3k miles ago. New ones sound exactly the same. Just beat the hell out of the stockers and get them replaced for free under wastegate rattle warranty.

What do you tell them if I get a faint siren when it's warm? Do I need to wait until the wastegates start to rattle? Right now they arn't, and I feel like they are going to tell me the whine is normal when it isn't

What do you tell them if I get a faint siren when it's warm? Do I need to wait until the wastegates start to rattle? Right now they arn't, and I feel like they are going to tell me the whine is normal when it isn't

Unless you are still under the standard warranty, they will only replace the turbos for the waste gate rattling. I'd be shocked if you didn't have waste gate rattle, i haven't heard a single N54 yet that didn't Try listening with your JB4 in bypass mode. I doubt they will do anything bout the siren type of noise. I've seen countless other people have the same siren sound, even jeff at Topgear solutions said he had it on his car since he purchased it - he never had any issues.

No flash, I know, but for the most part it is hitting target (ref trims). I have been running like this for over 20,000 miles. What do you think is the biggest concern? To me I think high EGTs...

Like I said though, over 20,000 miles with no issues. If nothing has happened yet, I am inclined to think nothing will happen in the future. I have been wrong before though and do plan to eventually get the flash.

@enrita can you clarify what my biggest concern should be with this lean of an AFR on E85 mix? I'd like to know so I can determine if it is worth investing in the Cobb or other parts such as suspension/brake.

@enrita can you clarify what my biggest concern should be with this lean of an AFR on E85 mix? I'd like to know so I can determine if it is worth investing in the Cobb or other parts such as suspension/brake.

the target AFR should be 13.5 down to 12.5 on E85 , you are not hitting that. I dont know why since your trims seems fine maybe lpfp pressure is low but than trims should be maxed so not really sure. Terry should be able to tell you what is the best to do.

the target AFR should be 13.5 down to 12.5 on E85 , you are not hitting that. I dont know why since your trims seems fine maybe lpfp pressure is low but than trims should be maxed so not really sure. Terry should be able to tell you what is the best to do.

I am pretty sure the JB4 G5 targets that to avoid trim outs unless you are running with a Cobb flash. I am not running with a flash, the AFR is on target (except for the very top end)... its just a high target. I am comfortable knowing that I won't have a knock issue here, I was mainly concerned about EGTs. Do you think that is going to be the main issue running this lean?

I am pretty sure the JB4 G5 targets that to avoid trim outs unless you are running with a Cobb flash. I am not running with a flash, the AFR is on target (except for the very top end)... its just a high target. I am comfortable knowing that I won't have a knock issue here, I was mainly concerned about EGTs. Do you think that is going to be the main issue running this lean?

Ask Terry, i would not want running that AFR on my car especially if you go deep into 4th-5th gear in a single pull. If you just pull some 3rds than yeah fine.